I understand, we can make server send the key when sendKey is set in the write policy through some client like Java Client. Can the same be mimicked when inserting record from aql client?
Thanks in ...

I'm trying to make a Markov text generator but I keep getting a KeyError that I don't understand.
In this function, I keep getting a Keyerror in the line w1, w2 = w2, random.choice(self.wordlog[w1]). ...

What is the data model to store millions of record efficiently in the aerospike database?
Use case : storing millions of bid(value) for a particular id(key) and
also need to iterate over the values ...

I'm wondering whether it would be a good idea to use hashes (CityHash, Murmur and the like) as keys in a key-value store like Hazelcast. I'm expecting to have about 2,000,000,000 records (URLs) in the ...

What is the best way of storing and querying data for a simple tasks management application (e.g.)? The goal is to have maximum performance with minimum resources consumption (CPU, disk, RAM) for a ...

Now I have a file recording the entries of a lookup table. If the number of entries is small, I can simply load this file into an STL map and perform search in my code. But what if there are many many ...

I am quite confusing what is the difference between a key-value storage like Cassandra compared to a distributed database with a table containing two columns. One column called key, the other called ...

I'm looking for a database system(NoSQL system I think) to store user ID and aliases mapping.
Each user ID may be associated with multiple aliases, I need to be able to perform fast look up from both ...

The binary data stored in CRDT: set seems to be sorted when fetched. Is the set a sorted set? This doesn't seem to be documented as such.
A related question would be how does the Riak 2i performance ...

In an application which persists the fontSize and fontColor that a user sets, what approach should be take to model the time series?
To elaborate, the user sets FontSize and FontColour at first run. ...

Say, I have a nested structure that is not arbitrary depth. E.g. employees and departments.
The most frequent use I want to support is to display a list of departments and its employees, with paging ...

I am working on using Hbase as a Key-Value store where we have a column family with one single value. The java filter gets the row in less than a second but when trying to retrieve the value takes 15 ...

Simple Hash Keys seem to be too simple to write an article, while many write about Composite Hash/Range Keys, because Composite Hash/Range Keys are useful for many complex situations. But I believe ...

Can Riak be configured to use a third party backend? In a prior question a Basho employee said that you could "edit the config file and restart the server". What else would you need to do to connect a ...

Are documents in Couchbase stored in key order? In other words, would they allow efficient queries for retrieving all documents with keys falling in a certain range? In particular I need to know if ...

I am looking for solutions to storing a graph using memory mapped files. One possibility is to use a key-value store where the key would represent the nodes and the value the set of nodes that a node ...

We have a service that currently runs on top of a MySQL database and uses JBoss to run the application. The rate of the database growth is accelerating and I am looking to change the setup to improve ...

I have a TokyoTyrant server that seems to be corrupted. Server starts normally and read operations work fine. But when I try to put a new item, it returns an error. My database is large, it has 65GB. ...

We have an instance of redis, but it is running out of memory, so we decided to move to SSDB as it stores keys on disk instead of doing it in memory.
To migrate the existing keys from Redis to SSDB ...

I've been looking for answers to this problem, but unfortunately without success.
I'm developing a mathematical app (Swift-based), which keeps data of every function the user enters.
(I then need to ...

I need to update some documents at once, like a RDBMS transaction. The best way to do this for a single document in a key-value store like couchbase seems to be using optimistic locking. This would ...

I am trying to take a text file and take all the words longer then three letters and print them in a column. I then want to match them with the line numbers that they appear on, in a second column. ...

We need to synchronize some data in distributed environments that needs something like Acquire/Release on particular named resource in common data storage. We also have plans to use this data storage ...

I have a hash map and an ArrayList. Both of them are populated as I have tried to print them out and it works fine. The arrayList contains MeterNumbers (MeterNumber is the key of the HashMap). The map ...